# Examples for 8th grade - page 3

- Above 100%

What is 155% of 210? - Guests

How many ways can 7 guests sit down on 9 seats standing in a row? - Stock market

Simon one day decided to invest € 88000 to the stock market. After six months he invested July 5 stock markets fell by 56%. Fortunately for Simon from July 5 5 to October 5 his shares have risen by 39%. Simon is then: ? - Height

Is right that in any right triangle height is less or equal half of the hypotenuse? - Logs

Trunk diameter is 72 cm. Is it possible to inscribe a square prism with side 54 cm? - Series

Andrew wrote this series of numbers: 1,3,7,15, .... n. Which number in the series does not belong? ? - Playing cards

How many possible ways are to shuffle 7 playing cards? - Ace

From complete sets of playing cards (32 cards) we pulled out one card. What is the probability of pulling the ace? - Shelf

How many ways are there to arrange 9 books on a shelf? - Logic

A man drinks a barrel of water for 31 days, woman for 58 days, for how many days they drink barrel together? - Percent calculation

Calculate 72% if 96% is 93. - Trapezoid

Are diagonals in a rectangular trapezoid perpendicular and bisect the angles? - Road

Between cities A and B is route 3 km long of rise average 4‰. Calculate the height difference of cities A and B. - Painter Pavel

Painter Pavel painted the fence for 20 hours and painter Petr the same fence painted for 17 h. How long should take painted the fence together? - Right Δ

Right triangle has length of one leg 7 cm and length of the hypotenuse 25 cm. Calculate the height of the triangle. - KLMN

In the trapezoid KLMN is given this informations: 1. segments KL and MN are parallel 2. segments KL and KM has same length 3. segments KN, NM and ML has same length. Determine the size of the angle KMN. - Center traverse

It is true that the middle traverse bisects the triangle? - Cylinder - h

Cylinder volume is 129 cm^{3.}Base radius is 3 cm. Calculate the height of the cylinder. - Beer

After three 10° beers consumed in a short time there are 7.4 g of alcohol in 5 kg adult human blood. How much is it per mille? - Christmas Day

In leap years was 53 Sundays. On what day of the week fell to Christmas Day?

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